We aren't requesting any donations. Will not donate to any entity who says They can be raising resources for us. Hemagglutinin inhibition (HI) assay: The Hello assay assessments for antibodies into the hemagglutinin of the precise influenza virus making use of purple blood cells (RBC). Numerous different types of RBCs https://www.dailypioneer.com/2018/our-take/a-sari-and-a-dress.html